When regreasing the electric motor bearing as shown in figure "B" of the illustration, what practice should be avoided? EL-0218

Correct Answer: Option A — Completely filling the bearing cavity with new grease.

IEEE 45 maintenance standards explicitly prohibit completely filling electric motor bearing cavities with grease. Overpacking generates excessive internal fluid friction and churning, leading to rapid overheating, thermal expansion, premature lubricant breakdown, and forced migration past oil seals into the motor windings.